Normal-Mode Splitting in a Weakly Coupled Optomechanical System

Year: 2018

Authors: Rossi M., Kralj N., Zippilli S., Natali R., Borrielli A., Pandraud G., Serra E., Di Giuseppe G., Vitali D.

Autors Affiliation: Univ Camerino, Sch Higher Studies C Urbani, I-62032 Camerino, Macerata, Italy; Univ Camerino, Phys Div, Sch Sci & Technol, I-62032 Camerino, Macerata, Italy; Ist Nazl Fis Nucl, Sez Perugia, I-06123 Perugia, Italy; Inst Mat Elect & Magnetism, Nanosci Trento FBK Div, I-38123 Povo, Trento, Italy; Delft Univ Technol, Else Kooi Lab, NL-2628 Delft, Netherlands; TIFPA, Ist Nazl Fis Nucl, I-38123 Povo, Trento, Italy; CNR, INO, Lgo Enrico Fermi 6, I-50125 Florence, Italy; Univ Copenhagen, Niels Bohr Inst, Blegdamsvej 17, DK-2100 Copenhagen, Denmark.

Abstract: Normal-mode splitting is the most evident signature of strong coupling between two interacting subsystems. It occurs when two subsystems exchange energy between themselves faster than they dissipate it to the environment. Here we experimentally show that a weakly coupled optomechanical system at room temperature can manifest normal-mode splitting when the pump field fluctuations are antisquashed by a phase-sensitive feedback loop operating close to its instability threshold. Under these conditions the optical cavity exhibits an effectively reduced decay rate, so that the system is effectively promoted to the strong coupling regime.

Journal/Review: PHYSICAL REVIEW LETTERS

Volume: 120 (7)      Pages from: 073601-1  to: 073601-5

More Information: We acknowledge the support of the European Union´s Horizon 2020 research and innovation program under Grant agreement No. 732894 (FET Proactive HOT).
KeyWords: SINGLE QUANTUM-DOT; OPTICAL CAVITY; INDUCED TRANSPARENCY; LIGHT; MICROCAVITY; FEEDBACK; PHOTON; ATOM
DOI: 10.1103/PhysRevLett.120.073601

Citations: 49
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